The former Navy reservist who killed 12 people at the Washington Navy Yard had been hearing voices and was undergoing treatment in the weeks before the shooting rampage, but was not stripped of his security clearance, officials said Tuesday.

Aaron Alexis identified as Navy Yard shooter in multiple reports

BREAKING: Officials: Washington Navy Yard shooter who died after rampage identified as Aaron Alexis- The Associated Press (@AP) September 16, 2013Federal law enforcement officials say the man accused in a shooting rampage at the Washington Navy Yard that left at least 12 people dead has been identified as Aaron Alexis.The two officials spoke Monday to The Associated Press on condition of anonymity because they were not authorized to speak publicly.One of those officials says Alexis was a 34-year-old from Texas. ...